Test library shmem sanity function finds multiple 'Bandwidth' statements

[nordmoen]

I was setting up the hpctestlib.microbenchmarks.gpu.shmem test on our local cluster and encountered what I believe to be a bug in the sanity checking.

The problem appeared when trying to sanity check the number of GPUs. On our cluster we output additional information in the Slurm output, some of which contained the words Bandwidth. This fit the regex in assert_count_gpus which resulted in an inflated GPU count.

To fix this I changed the regex from r'Bandwidth' to r'Bandwidth\((int|double)\)' to better fit what I perceived in the test output to be the correct result sentence.

[vkarak]

Thanks for reporting this @nordmoen! We can fix the regex.